Oh well that's disappointing.
What's interesting is that they edited this page 6 days ago. Previously it talked about Persona.
It used to say the following
Is this process secure?
Your safety is our top priority. We leverage a secure, third-party service, Persona, to collect and review the documents you upload along with your selfie. Persona then automatically deletes your information after 90 days.
For record-keeping purposes, we keep your documents on file to assist with any future information changes you may need to make. We also have to keep some information as a minimum to comply with our regulatory obligations.
Now the FAQ section is gone completely.
https://help.wealthsimple.com/hc/en-ca/articles/4404981045915-Verify-your-identity